Grain-door.



s. P. ALQUIST.

GRAIN DOOR, APPLICATION FILED OCT. 23. I915.

Patented Mar. 19, I918.

S. P. ALQUIST.

GRAIN DOOR.

- APPLlCATlON FILED 00123. 1915.

l ,QSQ QE 1 Emma Mar. 1-9, 1918 I 2 SHEETS-SHEET 2.

A TTORNE llhl which the following is a specification. retaining strip arranged at the thresholdof My invention relates to a grain door for a the door epenin to support and guide the railway car, and the principal object ofthe grain door. 1 i invention is to provide a grain door struc Like characters of reference designate tin-e which may he made entirely or very like parts in the several figures of the draw largely of sheet metal pressed to the desired ings. configuration, and which will be strong, Referring to the drawings, 10 indicates rigid, simple and compact in construction the side sheathing of a railway box car, 11 and comparatively economical to manufacthe door opening in the side of the car, 12, ture. 13 the door posts, 14 the side sill and 15 The invention consists, in part, of'certain the outside sliding door which may be supconstructions for providing the main grain por ed in any desired manner. The main door with a relief or sub-door which can gr n door 16 consists preferably of a sinbe readily opened to relieve the pressure ,Q'le sheet of metal pressed to a dished conagainst the main door when the grain is to figuration with flat marginal flanges 17, 18, be unloaded, and which will close tightly 19, 20. The lower flange 18 rests and is 75. against the main door to prevent any posslidable upon a metal strip 21 (Fig. 5) sible leakage of the grain at such times as which extends across the door opening and the car is usedas a grain carrier. The inbackwardly into the car on one side therevention contemplates, preferably, ha ving the f- The portion within the side sheathing main door slide back and forth across the 1's P formed With an upstand ng door opening, in which case the construcguide flange 22. 23, 24 are threshold plates tion is such that the sub-door will not hinder D d g et een them a hannel f0! the the sliding movement of the main door. The l wer flange 18 of the door. The flange 18 main door, moreover. is located so that it is notched at one corner as shown at. 25, and itsattachments are in a protected posiand the strip 21 is formed or provided with lion, when the door is slid back from thenp 'oj fit ons 6- VVhcn he door-is in door opening, while the car, for example, is p sit-ion across the door opening, the projecused for carrying ordinary freight, sothat tion 26 is engaged with the notch 25, this these parts are not liable to injury from" engagement operating tohold the door in shifting of the cargo or like causes. proper place against the door posts. When The invention consists of such other new the door is opened the notch 25 comes into and improved constructions, arrangements, engagement with the projection 26* by and devices relating to grain doors for railmeans of which the door is held'in its open way on cars will he hereinafter deposition against accidental displacement scribed and claimed. from vibration or other causes. The upper The invention is illustrated in a preferred m rgin l flange 1? en r a h nn l shap d embodiment in the accompanying drawii'ige guide 27 attached to the inside of the wall of wherein-, the car. When the door is in its operative Figure 1 is a fragmentary side elevation of P S tiO I the langes 9 and 20 bear against I the superstructure of a railway box car the door posts 12, 13 respectively. provided with theusual outside sliding door The main door 16 is formed, preferably which is illustrated as pushed back from the at one lower corner, with an opening 28 and door opening so as to show the grain door the metal is pressed o t aro nd s p nof my invention in its operative position. ing to form an outstanding rib or corruga- Fig. 2 is a sectional plan on line 2-2 of tion 29. The opening 28 is closed. by means SVEN PETER ALQUIST. '03: DENISON, TEXAS, ASSIGNOR, BY DIRECT AND IJIESNE ASSIGN- MENTS, 0F NINE-TWENTIETHS TO WILLIAM L. KELLOGG, OF PARSONS, KANSAS, AND

TWO-TWENTIETHS TO ALLAN S. BARROWS, OF

GRAIN-DOOR.

Application filed October 23, 1925.

To (ZZZ 70760772 it may concern: I

Be it known that I, SvnN PETER AL UIST, a citizen of the United States, residing at Denison, in the county of Grayson and State of Texas, have invented certain new and 5 useful Improvements in Grain-Doors, of

Fig, 1 but on a larger scale than Fig. l.

Specification of Letters Patent.

Patented Mar. 1'9, 1918.

Serial No. 57,590.

in perspeclocking the of a subdoor 30 formed of sheet metal and,

pressed with a marginal corrugation 31 adapted to fit over the corrugation 29 on is squared atitsouter end. for a handle 36;

the loking member engages the corrugated edge of the main door (see Fig. '4) with a wedging engagement which forces the Sub-door against the main door. By the arrangements just described the possibility of the leakage of grain between the main door and the ,sub door'is' effectually prevented, even though, as will necessarily be. the case,

the pressure against the sub-door is veryconsiderable. By 'manipulation of the handle 36 the sub-door is readily unlocked "so that it will swing out to relieve the pressure' of grain against the main door sulliciently to allow the latter to he slid back in its guides. It will be observed that the sub-door, being located within the dished portion of the main door, does not interfere in any way with the sliding movement of the main door. Moreover, the sub-door and its attachments are protected against injury When the grain door structure is pushed away from the dooropening, as will be the case at such times as the car is being used 36 for. carrying ordinary freight. The dished construction of the main door gives it considerable 1 capacity for withstanding the thrusts to which it may be subjected, due to shifting of the cargo when the car is used 40 for carrying package freight.

Preferably the main door is further strengthened by forming it with a plurality of corrugations 37 which are pressed out into the hollow or dished portion of the door.

The rear lower corner of the main door is preferably beveled off as indicated at 38, so that when the door is moved to its open position it will easily ride over the projection 26 onthe strip 21. Preferably the forward "lower corner of the door is provided with a notch 25 in which the projec tion 26 seats when the door is open so that the edges of the door will rest squarely on the strip"2l.

Myinvention has been shown and dcscribed'in what is considered as its most desirable embodiment, but it .is realized that modifications might be made Without departing from the} rinciples of the inven- 80 tion. ihereforel 0 not wish to be understood as limiting the invention to the particular constructions, arrangements and devices particularly described and shown, except. so far as the claims are specifically so limited.

I claim:

1. A sheet metal grain door for a railway car, comprising a sheet of metal pressed into a dished configuration with marginal flanges adapted to bear against the door frame of a car, said door being formed in the lower portion thereof with an opcning and with.

a pressed out corrugation surrounding said opening, a sheet metal sub-door hinged to the first-named door on the concave side thereof and formed with a marginal corrugation which interlocks with the aforementioned corrugation, and fastening means for holding said sub door in closed position.

2. A railway car formed with a dooropening and provided at one side of said door opening within the car with guiding means for a door, n combination with a sheet metal grain door pressed to a dished configuratlon with the dished portion projecting inwardly into the car and with the marginal portions thereof forming flanges adapted to enter said guiding means; said door being formed with an opening and with an outstanding corrugation surrounding said opening, a sub-door hinged to said main door within the dished portion thereof pro-,

vided with a marginal corrugation which interlocks with the corrugation on the main door, and fastening means for holding said sub-door in closed position.

3. A railway car formed with a door opening and provided at one side of said door opening within the car with guiding means for a door, in combination with a sheet metal grain door pressed to a dished configuration with the dished portion projecting inwardly into the car and with the marginal portions thereof forming flanges adapted to enter said guiding means; said svnu PETER ALQUIST. 

